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Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles

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  #1  
Old 10-30-2008, 10:30 PM
noob noob is offline
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Default chain tensioner

i was fiddling with some stuff on my bike and 5 miles down the road my idler pulley came off... ididnt tighten it down enough. where can iget a new pulley
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  #2  
Old 10-30-2008, 10:53 PM
brobie brobie is offline
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Default Re: chain tensioner

I really like the one that ThatsDax sells. I replaced the one that came with my kit with theirs. It has a ball bearing in it that made things run smoother for me. Some other people remove the tensioner altogether.
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  #3  
Old 10-30-2008, 10:59 PM
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OSCAR383 OSCAR383 is offline
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Default Re: chain tensioner

i made a custom tensioner mount that welded to the bike frame ...... and then didnt even use it
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Old 10-30-2008, 11:02 PM
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misteright1_99 misteright1_99 is offline
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Default Re: chain tensioner

This is a simple mod.................

http://motorbicycling.com/f6/spring-...ioner-890.html
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  #5  
Old 10-31-2008, 02:14 AM
noob noob is offline
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Cool Re: chain tensioner

is there a downside to going without the tensioner??
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  #6  
Old 10-31-2008, 08:23 AM
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Bikeguy Joe Bikeguy Joe is offline
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Default Re: chain tensioner

I replace them with a skateboard wheel with ceramic bearings.
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Old 10-31-2008, 11:03 PM
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Norman Norman is offline
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Default Re: chain tensioner

I'm pretty fond of the skateboard wheel too I thin them on the lathe and cut off the outer rubber or what ever that stuff is then make a little shoulder on each side seems to work very good.
Norman
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Old 11-01-2008, 02:09 AM
niinnn niinnn is offline
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Default Re: chain tensioner

Rollerblade wheels are also really good as they are already narrower and have a harder compound to the urethane so they last alot longer.
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Old 11-01-2008, 08:58 AM
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Bikeguy Joe Bikeguy Joe is offline
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Default Re: chain tensioner

I grind the groove the old fashioned (or hard) way- on a bench grinder.

Hey Norman- I never knew there was an "outer tire" on those things and I was grinding the groove into my first one and the "re-tread" flew off like a road gator from a 100mph semi!
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Old 11-03-2008, 05:15 AM
niinnn niinnn is offline
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Default Re: chain tensioner

You can buy them for downhill bikes but they are a rip off $ and you dont get to make it yourself
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